Improvement in pulleys



F4. H. CRAFTS.

` PUL-LEY.

N.174,Z03. Patente@ Feb. 291.1875.

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*UNITEDrIST-ATES PATENT FFICE.

l `ERA-Nurs ,11 oEAETS,`VoE WILLAMSPOET, PENNSYLVANIA, ASSiGNoE oF ONE-HALE `Hrs EIGHT To HENRY EEAED., or vSAME PLACE,

i `Speoiczttion forming part Letters Patent No'. 174.203, dated February 29,1876; application tiled f l January'29,vl87'6.

Be it known that I, FRANCIS H. CRAFTS, of Williamsport, in the county of Lycoming and State of Pennsylvania, have invented'certain new and useful Improvements in Pulleys, of

` whiclrthe following is aspecilication and I do hereby declare thatin the same is contained a full, clear, andexact description of my said invention, reference being' had to the accompnnying drawings and to .the letters of refer- -ence marked thereon. l l

' amcter as to slaoken the belt whenrunning thereon, and thereby reduce the tension of the said belt, and, consequently, its Wear, when not employed in the transmission of movement to machinery.

In the description of my invention which follows due reference .must be had to the accompanying drawing, forming apart of thisv specification, and in Which- Figure 1 is a side view of a series of pulleys embodying my invention, the belt being represented as running on the loose pulley. Fig.

.of the pulley B.

2 .is an edge view of the invention, and Figs. 3 and 4 the invention modifiedin construction.

Similar letters of `reference indicate similar part in all the figures.

Y A is the driving-pulley Aand. B theV tight pulley which transmits motion to the shaft a.

AG is a pulley of a diameter considerably less than that of the pulley B, running loosely upon the shaft ct. The pulley B is provided with a'conically-shaped flange, b, the outer diameter of which corresponds nearly to that The driving-belt which connects the driving-pulley A with either the tightv or loose pulley is represented by I). The belt isltransferred to and from the loose pulley C by means of anordinnry shifter, the

conical. Harige guiding the belt in its lateral.

movement.l In Fig. 3 the conical flange is loose upon the shaft a, but not secured to the vloose pulley C. In' Fig. 4 the conical flange is secured to the tight pulley B.'

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

In combination with a tight and'loose pulley situated upon the saine shaft, the conical flange b, substantially as and for the purpose set forth. f

, FRANCIS H; CRAFTS. Witnesses:

A. H. DEUEL,

NELSON RUNKEE. 

